CN105157837A - Hyperspectral full polarization imager based on acousto-optic filtering and electro-optical phase modulation - Google Patents
Hyperspectral full polarization imager based on acousto-optic filtering and electro-optical phase modulation Download PDFInfo
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Abstract
The invention relates to the field of hyperspectral imager technology, in particular to a hyperspectral full polarization imager based on acousto-optic filtering and electro-optical phase modulation. The hyperspectral full polarization imager is an imaging device combining hyperspectral imaging and full polarization imaging, and relates to a method for simultaneous detection and acquisition of the space, spectral and polarization information of an observed object. The hyperspectral full polarization imager is based on an acousto-optic tunable filter for splitting and a DKDP longitudinal electro-optical phase modulator for polarization detection; and comprises a front imaging lens used for collection, collimation and contraction of radiation, reflection, scattering and transmission light of the object under test and primary imaging to an AOTF; DKDP longitudinal electro-optical phase modulators for phase modulation; the AOTF for filtering and polarization detection; a light shielding plate for shielding 0-level and +1-level diffracted light through the AOTF; a secondary imaging conduction lens for secondary imaging of -1-level diffracted light to a planar array imaging CCD; and a control computer. The invention is mainly used in the field of a hyperspectral imager.
Description
Technical field
The present invention relates to hyperspectral imager technical field, be specifically related to a kind ofly to filter and the high spectrum full polarization imaging instrument of electric light planet phasing based on acousto-optic, be the imaging device that a kind of high light spectrum image-forming combines with full polarization imaging, relate to the method that the space to observed object, spectrum and polarization information detect acquisition simultaneously.
Background technology
Spectral polarization imaging technology is comprehensive to spectral imaging technology and polarization imaging technology.Spectral polarization imaging can obtain the space of target, spectrum and polarization information simultaneously, to the geometric form shadow feature of target, the spectral signature of radiation, reflection, scattering and transmitted electromagnetic wave, the material physicochemical characteristicses such as surfaceness, density, conductivity, water cut carry out fusion perception, and then profoundly to realization of goal assessment, classification and identification.Spectral polarization imaging technology is in survey of deep space, earth resource survey, environmental monitoring, military target identification, the field such as biomedical imaging and food security has achieved preliminary application, and using value in these areas and prospect are subject to the attention of domestic and international scientific research institution.
At present, according to the difference of spectral polarization imaging mode, spectral polarization imaging technology is mainly divided into dispersion element to add polarizer type, novel polarization interference imaging spectral pattern and filter element and adds polarizer type three class.Dispersion element is prism and grating mainly, and polarizer is polaroid and phase-modulator mainly, and filter element is optical filter and tunable filter mainly.(1) for spectral imaging technology, the spectral resolution of color dispersion-type imaging spectral and Spatial resolution, because being subject to the restriction of slit width, limiting the luminous flux of the system of entering, thus reduce the signal to noise ratio (S/N ratio) of light spectrum image-forming; Optical filtering flap-type needs rotating filtering sheet, and provides wave band number limited, and spectral resolution is low.(2) for polarization imaging, polarizer mode needs rotatory polarization sheet, and can only detect linearly polarized light, i.e. first three component of Stokes parameter; Novel polarization interference imaging spe ctroscopy can obtain full-polarization spectrum simultaneously, but needs the relative motion of instrument and the detection of a target, pushes away the acquisition of having swept target interferogram, and target image restores quite complicated and difficult, and Banded improvement is serious, and spatial resolution is lower.
Summary of the invention
In view of this, the present invention is intended to solve the present stage technical barrier that runs into of spectral polarization imaging, provides a kind of and filters based on acousto-optic and the high spectrum full polarization imaging instrument of electric light planet phasing.This spectral polarization imaging instrument realizes light splitting based on acousto-optic tunable filter and the longitudinal electro-optic phase modulator of DKDP realizes Polarization Detection.
In order to solve the problems of the technologies described above, the technical solution used in the present invention is:
Filter and the high spectrum full polarization imaging instrument of electric light planet phasing based on acousto-optic, comprising:
Preposition imaging lens, carries out collection collimation contracting bundle to measured target radiation, reflection, scattering and transmitted light, is shaped as less parallel light, and Polaroid in AOTF;
The longitudinal electro-optic phase modulator of DKDP, be set to two, be respectively the longitudinal electro-optic phase modulator of a DKDP and the longitudinal electro-optic phase modulator of the 2nd DKDP, be set in turn between preposition imaging lens and AOTF, carry out planet phasing, the longitudinal electro-optic phase modulator of described DKDP is connected with computer for controlling by direct-current high-voltage drive circuit;
AOTF, carry out filtering and analyzing, described AOTF is connected with computer for controlling by radio-frequency (RF) driver circuit;
Shadow shield, blocks by 0 grade of AOTF and+1 order diffraction light;
Secondary imaging conduction camera lens, by-1 order diffraction light secondary imaging on the array image-forming CCD of face;
Computer for controlling, the direct-current high-voltage drive circuit of the longitudinal electro-optic phase modulator of control DKDP simultaneously, the radio-frequency (RF) driver circuit of AOTF and face array image-forming CCD, and trigger face array image-forming CCD while the longitudinal electro-optic phase modulator of DKDP is applied often to organize phase delay and gather an image, computer for controlling gathers, and process is storage figure picture also.
Described preposition imaging lens comprises image-forming objective lens, field stop and collimating mirror.
The longitudinal electro-optic phase modulator of described DKDP selects the z cutting DKDP wafer that electrooptical coefficient is large, half-wave voltage is low to make longitudinal P ockels box, light is led to along optical axis z, indium tin oxide transparency electrode is put in the plating of logical light face, wafer is cut into Circular wafer, when ensureing to apply voltage to the transparency electrode in two logical light faces, in whole effective clear aperature, form uniform electric field along optical direction (optical axis z direction).
The driving circuit of the longitudinal electro-optic phase modulator of described DKDP is direct-current high-voltage drive circuit, output voltage amplitude scope is 0 ~ 15kv, and driver output voltage is programmed adjustable by computer for controlling, make the light of the longitudinal electro-optic phase modulator of DKDP to AOTF work output wavelength can realize 0 respectively, the phase delay of pi/2 and π by regulating driving voltage.
The acoustic optic interaction crystal of described AOTF selects tellurium oxide crystal, x cuts lithium niobate crystal chip as piezoelectric transducer, incident light is along tellurium oxide crystal [001] direction, ultrasound wave is propagated along tellurium oxide crystal [110] direction, described acoustic optic interaction crystal adopts wedge design when leading to glossy cut, and p-1 order diffraction light eliminates aberration, operating wavelength range: 0.4 ~ 2 μm, piezoelectric transducer frequency of operation: 60 ~ 130 ~ 220MHz, spectral resolution 10nm.
Described radio-frequency (RF) driver circuit frequency of operation: 60 ~ 130 ~ 220MHz, driving power scope: 0 ~ 2W, the frequency of operation of described radio-frequency (RF) driver circuit and the diffraction light wavelength one_to_one corresponding of AOTF, described radio-frequency (RF) driver circuit has single-frequency and frequency sweep two kinds of mode of operations, and the frequency interval of frequency of operation or frequency sweep and the time interval all can by computer for controlling programming Control.
-1 grade of light of described AOTF diffraction is the polarized light of polarization direction along x-axis, and the modulation quick shaft direction of the longitudinal electro-optic phase modulator of described DKDP gets 0 ° and 45 ° respectively relative to-1 order diffraction light polarization direction of AOTF.
When described AOTF applies the driving of certain frequency, corresponding diffraction wavelength applies (0 respectively to the longitudinal electro-optic phase modulator of DKDP, 0), (0, pi/2), (0, π) with (pi/2, pi/2) four groups of phase delays, and each group phase delay of each wavelength corresponding, the corresponding collection piece image of face array image-forming CCD, carries out data processing by image corresponding for four groups of phase delay and just obtains whole Stokes parameter chart, extract the DN value of first parameter chart of this wavelength Stokes parametric image, just obtain the spectral information of target.
The beneficial effect that compared with prior art the present invention has is:
1) this spectral polarization imaging instrument adopts preposition imaging lens Polaroid to AOTF, through the secondary imaging optical texture of secondary imaging conduction lens imaging to face array image-forming CCD after diffraction, incident light is premenstrual is set to the shaping of picture shot compression close to directional light, improve diffraction efficiency and the spectral resolution of AOTF, secondary imaging conduction ensure that image quality;
2) uniaxial crystal DKDP crystal selected by electro-optic phase modulator, makes longitudinal modulation Pockels box, along optical axis direction added electric field and logical light.And electrooptic modulator is placed between preposition imaging lens and AOTF, incident light by compression shaping close to directional light, without phase delay when not applying modulation voltage, after applying modulation voltage, whole clear aperature achieves uniform phase-modulation, ensure that Polarization Detection precision;
3) the longitudinal electro-optic phase modulator of DKDP, the modulation voltage of phase delay is only determined and leads to optical thickness to have nothing to do by the refractive index of incident light and the electrooptical coefficient of crystal, wafer is cut into Circular wafer, ensure that the homogeneity of phase-modulation in larger clear aperature, thickness is about 5mm, ensure that larger logical light quantity, save device space, debug rationally simple;
4) AOTF optical filtering tuning speed is fast, fixed frequency or frequency sweep two kinds of working modes of optional, spectral resolution is high, and AOTF diffraction light is polarized light, not only serve point light action and also serve analyzing effect, surveying polarization with the longitudinal electric light planet phasing of DKDP can be combined well.
The longitudinal electric light phase-modulation of DKDP, AOTF light splitting and ccd image collection control by computer for controlling, and computer for controlling also completes image procossing in addition, the work such as storage and display, this spectral polarization imaging device, movement-less part, simple to operate, good stability, is convenient to industrial automation Integrated predict model.
Accompanying drawing explanation
Below by accompanying drawing, the specific embodiment of the present invention is described in further detail.
Fig. 1 is structural representation of the present invention;
Fig. 2 is AOTF structural representation of the present invention;
Fig. 3 is the longitudinal electro-optic phase modulator structural representation of DKDP.
In figure: 1 be direct-current high-voltage drive circuit for z cuts DKDP Circular wafer, 22 for plastic support shell, 3 is the longitudinal electro-optic phase modulator of the 2nd DKDP, 4 for preposition imaging lens, 2 is the longitudinal electro-optic phase modulator of a DKDP, 21,5 be AOTF, 51 be piezoelectric transducer, 52 be ultrasonic travelling wave, 53 be acoustic absorbing medium, 6 be radio-frequency (RF) driver circuit, 7 be shadow shield, 8 be computer for controlling for secondary imaging conduction camera lens, 9 is face array image-forming CCD, 10.
Embodiment
The invention will be further described by reference to the accompanying drawings for embodiment below.
As shown in Figure 1, the invention provides and a kind ofly to filter and the high spectrum full polarization imaging instrument of electric light planet phasing based on acousto-optic, the structure of this spectral polarization imaging instrument mainly comprises: the longitudinal electro-optic phase modulator of preposition imaging lens 1, DKDP, high voltage DC drive circuit 4, acousto-optic tunable filter (Acousto-opticTunableFilter, AOTF) 5, radio-frequency (RF) driver circuit 6, shadow shield 7, secondary imaging conduction camera lens 8, face array image-forming CCD9 and computer for controlling 10.This spectral polarization imaging instrument, on the basis of traditional optical imaging, carries out planet phasing with the longitudinal electro-optic phase modulator of DKDP, filters with AOTF5, will obtain the full spectrum information of the space of imageable target, spectrum and polarization simultaneously.
By acousto-optic tunable filter (Acousto-opticTunableFilter, AOTF) 5 for light spectrum image-forming, AOTF5 structure as shown in Figure 2, first according to wish imaging light wavelength, through radio-frequency (RF) driver circuit 6, the high-frequency driving signal of correspondence is loaded into the capable ripple 52 of excitation ultrasound on piezoelectric transducer 51, ultrasonic travelling wave 52 is by acoustic optic interaction crystal and absorbed by acoustic absorbing medium 53 at the other end, the body grating that ultrasonic travelling wave 52 makes acoustic optic interaction Crystallization move, incident light is through out-of-date generation diffraction.Obviously, radio-frequency (RF) driving signal frequency and diffraction wavelength are one to one, therefore by regulating the frequency of drive singal to select the diffraction light of respective wavelength to realize to filter.Wherein our AOTF5 of selecting, logical light face introduces p-1 order diffraction light achromat-design, so 0 grade and+1 order diffraction light block by our system, p-1 order diffraction photoimaging.
Longitudinal for DKDP electro-optic phase modulator is used for polarization imaging, and as shown in Figure 3, the z being coated with transparency electrode cuts DKDP Circular wafer 21 and is fixed in plastic support shell 22 the longitudinal electro-optic phase modulator structure of DKDP.According to the optical wavelength of light spectrum image-forming, apply electric field by direct-current high-voltage drive circuit 4 and realize corresponding phase delay.
Usually the detection of a target is reflected, light Stokes expressed as parameters that transmission and radiation enter system is
(1)
Wherein,
,
,
with
for 4 components of Stokes parameter, according to the definition of Stokes parameter,
for total plot of light intensity picture of imageable target,
for polarization direction is along the light intensity difference in level and vertical two orthogonal directionss,
for polarization direction is along the light intensity difference on 45 ° and 135 ° of two orthogonal directionss,
for the light intensity difference of dextrorotation and left circularly polarized light.The present invention's Muller matrix analyzes polarization imaging process, and the fast axle of modulation of the longitudinal electro-optic phase modulator of DKDP gets 0 ° and 45 ° respectively relative to-1 order diffraction light polarization direction, and-1 order diffraction light polarization direction is along volume coordinate x direction.If the polarization of-1 order diffraction light representative of AOTF and the Muller matrix of the longitudinal electro-optic phase modulator of DKDP are respectively
,
with
, be expressed as follows
(2)
(3)
(4)
Wherein
with
be respectively the longitudinal electro-optic phase modulator of DKDP to the phase delay of imaging light wavelength.After system shown in Figure 1, the Stokes parameter of emergent light is
(5)
Substitution (1), (2), (3) and (4) formula (5) formula of bringing into obtain
(6)
In fact, CCD can direct detection to be the one-component of Stokes parameter, so for the light intensity of CCD imaging in system
for
(7)
In order to the whole Stokes parameters obtaining each imaging spectral can be solved, by the longitudinal electro-optic phase modulator of DKDP, (0 is applied respectively to each imaging spectral, 0), (0, pi/2), (0, π) with (pi/2, pi/2) four groups of phase delays, CCD collects 4 width images altogether to each imaging spectral, stored in computer for controlling 10, such as, charge to table 1.
The imaging of table 1 out of phase Delay time CCD
| Phase delay | (0,0) | (0,π/2) | (0,π) | (π/2,π/2) |
| CCD imaging light intensity |
4 Stokes parametric image image simultaneous solution in upper table being obtained incident light are respectively
(8)
Extract
the DN value that image is corresponding just obtains spectral information, utilizes the Stokes parameter chart in (8) formula can also obtain linear polarization degree figure, polarization image angle figure and the full degree of polarization figure of imageable target further.
Drawings and Examples described herein are only in order to illustrate that technical solution of the present invention is not intended to limit; Although with reference to preferred embodiment to invention has been comparatively detailed description, it will be understood by those skilled in the art that; Still can modify to the specific embodiment of the present invention or equivalent replacement is carried out to portion of techniques feature; And not departing from the spirit of the present invention program, it all should be encompassed in the middle of the technical scheme scope of request of the present invention protection.
Claims (8)
1. filter and the high spectrum full polarization imaging instrument of electric light planet phasing based on acousto-optic, it is characterized in that, comprising:
Preposition imaging lens (1), carries out collection collimation contracting bundle to measured target radiation, reflection, scattering and transmitted light, is shaped as less parallel light, and Polaroid in AOTF(5);
The longitudinal electro-optic phase modulator of DKDP, be set to two, be respectively the longitudinal electro-optic phase modulator (2) of a DKDP and the longitudinal electro-optic phase modulator (3) of the 2nd DKDP, be set in turn in preposition imaging lens (1) and AOTF(5) between, carry out planet phasing, the longitudinal electro-optic phase modulator of described DKDP is connected with computer for controlling (10) by direct-current high-voltage drive circuit (4);
AOTF(5), carry out filtering and analyzing, described AOTF(5) be connected with computer for controlling (10) by radio-frequency (RF) driver circuit (6);
Shadow shield (7), will by AOTF(5) 0 grade and+1 order diffraction light block;
Secondary imaging conduction camera lens (8), by-1 order diffraction light secondary imaging in face array image-forming CCD(9) on;
Computer for controlling (10), the direct-current high-voltage drive circuit (4) of the longitudinal electro-optic phase modulator of control DKDP simultaneously, AOTF(5) radio-frequency (RF) driver circuit (6) and face array image-forming CCD(9), and trigger face array image-forming CCD(9 while the longitudinal electro-optic phase modulator of DKDP is applied often to organize phase delay) gather an image, computer for controlling gathers, and process is storage figure picture also.
2. according to claim 1ly a kind ofly to filter and the high spectrum full polarization imaging instrument of electric light planet phasing based on acousto-optic, it is characterized in that: described preposition imaging lens (1) comprises image-forming objective lens, field stop and collimating mirror.
3. according to claim 1ly a kind ofly to filter and the high spectrum full polarization imaging instrument of electric light planet phasing based on acousto-optic, it is characterized in that: the longitudinal electro-optic phase modulator of described DKDP selects the z cutting DKDP wafer that electrooptical coefficient is large, half-wave voltage is low to make longitudinal P ockels box, light is led to along optical axis z, indium tin oxide transparency electrode is put in the plating of logical light face, wafer is cut into Circular wafer, when ensureing to apply voltage to the transparency electrode in two logical light faces, in whole effective clear aperature, form uniform electric field along optical direction (optical axis z direction).
4. a kind of according to claim 1 or 3 filters and the high spectrum full polarization imaging instrument of electric light planet phasing based on acousto-optic, it is characterized in that: the driving circuit of the longitudinal electro-optic phase modulator of described DKDP is direct-current high-voltage drive circuit (4), output voltage amplitude scope is 0 ~ 15kv, and driver output voltage is programmed adjustable by computer for controlling (10), the longitudinal electro-optic phase modulator of DKDP is made to AOTF(5 by regulating driving voltage) light of the output wavelength that works can realize 0, the phase delay of pi/2 and π respectively.
5. according to claim 1ly a kind ofly to filter and the high spectrum full polarization imaging instrument of electric light planet phasing based on acousto-optic, it is characterized in that: described AOTF(5) acoustic optic interaction crystal select tellurium oxide crystal, x cuts lithium niobate crystal chip as piezoelectric transducer, incident light is along tellurium oxide crystal [001] direction, ultrasound wave is propagated along tellurium oxide crystal [110] direction, described acoustic optic interaction crystal adopts wedge design when leading to glossy cut, p-1 order diffraction light eliminates aberration, operating wavelength range: 0.4 ~ 2 μm, piezoelectric transducer frequency of operation: 60 ~ 130 ~ 220MHz, spectral resolution 10nm.
6. according to claim 1ly a kind ofly to filter and the high spectrum full polarization imaging instrument of electric light planet phasing based on acousto-optic, it is characterized in that: described radio-frequency (RF) driver circuit (6) frequency of operation: 60 ~ 130 ~ 220MHz, driving power scope: 0 ~ 2W, the frequency of operation of described radio-frequency (RF) driver circuit (6) and AOTF(5) diffraction light wavelength one_to_one corresponding, described radio-frequency (RF) driver circuit (6) has single-frequency and frequency sweep two kinds of mode of operations, and the frequency interval of frequency of operation or frequency sweep and the time interval all can by computer for controlling (12) programming Control.
7. according to claim 1ly a kind ofly to filter and the high spectrum full polarization imaging instrument of electric light planet phasing based on acousto-optic, it is characterized in that: described AOTF(5)-1 grade of light of diffraction is the polarized light of polarization direction along x-axis, the modulation quick shaft direction of the longitudinal electro-optic phase modulator of described DKDP gets 0 ° and 45 ° respectively relative to-1 order diffraction light polarization direction of AOTF.
8. according to claim 1ly a kind ofly to filter and the high spectrum full polarization imaging instrument of electric light planet phasing based on acousto-optic, it is characterized in that: described AOTF(5) when applying the driving of certain frequency, corresponding diffraction wavelength applies (0 respectively to the longitudinal electro-optic phase modulator of DKDP, 0), (0, pi/2), (0, π) with (pi/2, pi/2) four groups of phase delays, and each group phase delay of each wavelength corresponding, face array image-forming CCD(9) corresponding collection piece image, image corresponding for four groups of phase delay is carried out data processing and just obtains whole Stokes parameter chart, extract the DN value of first parameter chart of this wavelength Stokes parametric image, just the spectral information of target is obtained.
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| CN105675134A (en) * | 2016-02-01 | 2016-06-15 | 南京理工大学 | FLC-based hyperspectral all-polarization imaging device and method |
| CN107271039A (en) * | 2017-07-13 | 2017-10-20 | 西安交通大学 | Compact miniature fast illuminated spectral imaging detecting device and detection method |
| CN107356333A (en) * | 2017-06-29 | 2017-11-17 | 华中光电技术研究所（中国船舶重工集团公司第七七研究所） | A kind of infrared spectrum polarized imaging system and its parameter optimization collocation method |
| CN108180995A (en) * | 2018-01-05 | 2018-06-19 | 长春理工大学 | Polarized light composes camera |
| CN108871576A (en) * | 2017-05-12 | 2018-11-23 | 长春理工大学 | A kind of polarization imaging device based on calculating optical |
| CN109115339A (en) * | 2018-05-16 | 2019-01-01 | 中北大学 | One kind being based on AOTF and intensity modulated high speed high spectrum full polarization imaging device and method |
| CN109141643A (en) * | 2018-09-28 | 2019-01-04 | 福建师范大学 | A kind of broadband signal light polarization composition is than measuring device and method |
| CN110763339A (en) * | 2018-07-25 | 2020-02-07 | 中国科学院西安光学精密机械研究所 | Double-filtering energy feedback type hyperspectral imaging polarization detection device |
| CN110763338A (en) * | 2018-07-25 | 2020-02-07 | 中国科学院西安光学精密机械研究所 | Energy feedback type hyperspectral imaging device based on acousto-optic tunable filter |
| CN111220270A (en) * | 2020-01-14 | 2020-06-02 | 安徽艾华测控技术有限公司 | Narrow-band spectral analysis system based on scanning galvanometer |
| CN113790798A (en) * | 2021-09-03 | 2021-12-14 | 中国科学院西安光学精密机械研究所 | Seamless spectral imaging device, system and method for dynamic point target tracking measurement |
| CN108180995B (en) * | 2018-01-05 | 2024-04-05 | 长春理工大学 | Novel polarization spectrum camera |
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| CN105675134B (en) * | 2016-02-01 | 2017-09-22 | 南京理工大学 | High spectrum full polarization imaging apparatus and method based on FLC |
| CN105675134A (en) * | 2016-02-01 | 2016-06-15 | 南京理工大学 | FLC-based hyperspectral all-polarization imaging device and method |
| CN108871576A (en) * | 2017-05-12 | 2018-11-23 | 长春理工大学 | A kind of polarization imaging device based on calculating optical |
| CN107356333A (en) * | 2017-06-29 | 2017-11-17 | 华中光电技术研究所（中国船舶重工集团公司第七七研究所） | A kind of infrared spectrum polarized imaging system and its parameter optimization collocation method |
| CN107271039A (en) * | 2017-07-13 | 2017-10-20 | 西安交通大学 | Compact miniature fast illuminated spectral imaging detecting device and detection method |
| CN108180995A (en) * | 2018-01-05 | 2018-06-19 | 长春理工大学 | Polarized light composes camera |
| CN108180995B (en) * | 2018-01-05 | 2024-04-05 | 长春理工大学 | Novel polarization spectrum camera |
| CN109115339B (en) * | 2018-05-16 | 2021-04-20 | 中北大学 | High-speed hyperspectral full-polarization imaging device and method based on AOTF and intensity modulation |
| CN109115339A (en) * | 2018-05-16 | 2019-01-01 | 中北大学 | One kind being based on AOTF and intensity modulated high speed high spectrum full polarization imaging device and method |
| CN110763339A (en) * | 2018-07-25 | 2020-02-07 | 中国科学院西安光学精密机械研究所 | Double-filtering energy feedback type hyperspectral imaging polarization detection device |
| CN110763338B (en) * | 2018-07-25 | 2020-08-28 | 中国科学院西安光学精密机械研究所 | Energy feedback type hyperspectral imaging device based on acousto-optic tunable filter |
| CN110763339B (en) * | 2018-07-25 | 2020-09-29 | 中国科学院西安光学精密机械研究所 | Double-filtering energy feedback type hyperspectral imaging polarization detection device |
| CN110763338A (en) * | 2018-07-25 | 2020-02-07 | 中国科学院西安光学精密机械研究所 | Energy feedback type hyperspectral imaging device based on acousto-optic tunable filter |
| CN109141643B (en) * | 2018-09-28 | 2024-01-30 | 福建师范大学 | Broadband signal light polarization component ratio measuring device and method |
| CN109141643A (en) * | 2018-09-28 | 2019-01-04 | 福建师范大学 | A kind of broadband signal light polarization composition is than measuring device and method |
| CN111220270A (en) * | 2020-01-14 | 2020-06-02 | 安徽艾华测控技术有限公司 | Narrow-band spectral analysis system based on scanning galvanometer |
| CN113790798A (en) * | 2021-09-03 | 2021-12-14 | 中国科学院西安光学精密机械研究所 | Seamless spectral imaging device, system and method for dynamic point target tracking measurement |
| CN113790798B (en) * | 2021-09-03 | 2022-07-19 | 中国科学院西安光学精密机械研究所 | Seamless spectral imaging device, system and method for dynamic point target tracking measurement |
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